What does Royalty Free music mean?

The term "royalty free music" is old, and until recently it has implied one thing: that there are no mechanical/synchronization costs associated with the music. Epidemic Sound's definition of royalty free goes further. Not only is the music free from mechanical/synchronization costs, it is also free from public performance costs. In addition the Epidemic Sound music is both legally and financially cleared for all platforms worldwide. In other words you are always free to use the musical content on all platforms available wherever you are without any further costs or legal negotiations. We call this all rights included.